Auxiliary draft attachment



' Mmh 11, 1930. w. A. NOEL 1,749,839

AUXILIARY DRAFT ATTACHMENT Filed Jan. 5, 1927 3 Sheets-Sheet l March 1l, 1930. w. A. NOEL AUXILIARY DRFT ATTACHMENT Filed Jan. 5, 1927 s sheets-sheet 2 March 1l, 1930. w, A NOEL 1,749,839

AUXILIARY DRAFT ATTACHMENT Filed Jan. 5, 1927 z' sheets-sheet 5 A TTORNE Y Patented Mar. 11, 193()r PATENT OFFICE WILLIAM A. NOEIJ, F WASHINGTON, DISTRICT OF COLUMBIA AU'XILIAKRYA DRAFT ATTACHMENT Application med January 1927. Vserial No. 159,095.

This invention relates to new and useful' v lmprovements 1n kauxiliary draft attachments. l

The primary object of this invention is to 5 provide an auxiliary draft attachment which will permit very fine fuel, such as buckwheaty orrice coal, saw-dust, shavings, etc., Ato be burned in domestic and commercial furnaces. A further object of the invention `is to,

f 10 provide a draft attachment of the above rej ferred to type -which will be exceedingly simple in construction, inexpensive to manufacture, and very efficient in its operation;

, Other objects and advantages of the inven-'I tion will be apparent during the course of the following description:

. In the accompanying numerals are vemployed to designate like parts V 4throughout the same,

Figure 1 is a top plan view of an'auxiliary draft attachment embodying this invention, Figure 2 is a vertical sectional View of the vvdraft attachment and taken upon line2-2Y ofV Figure 1, Y

F igure-3 is a top plan view of a vmodified form of auxiliary draft attachment,

'Figure 4 is a top plan view of a further modified form of auxiliary draft attachment, VFigure 5 is a'detail view, partly in section,

showing means employed for detachably con-f necting the air emitting tubes Vto the' basev structure,

fied form of connection between the base and its supporting legs, and f i ment illustrated in Figs. vland 2 positioned 40 therein. l Y f In therdrawings, wherein for the purpose these gures. This base portionwis of substantially circular or annular formation forv the purpose of adapting the sameto the contourv of fire boxes usually found indomestic hot water and steam furnaces, as illustrated drawings forming apart of this Ispecification and in which likey in Figure 7. vThis base is cast from iron, steel, or the like, and possesses the apertures 8 which lighten the base and permit the passage of air therethrough. Projecting perpendicularly from the base 7 and cast integral therewith are the hollow bosses 9 which are equi-spaced around the base. It is to be understood, however, that the number of bosses shown in these three figures is not to govern for any desired number may beprovided and that the spacing of the bosses may be varied in accordance with the requirements.

At suitably yspaced ,intervals around the lower face of theA base 7 radially extending ribs 10 are formed. These ribs are received within grooves 411 formed in the upper faces j of the/inner end portions of the radially extending legs 12. To permit longitudinal adj ustment of these legs, the same are provided with slots l'through which pass the bolts 14 depending from the base 7.

While Figure 1 shows the provision of five of these adjustable legs, Vit is to be understood that I do not desire to limit myself to any such number and in fact I have found it advantageous to employ-only three legs the 'same being positioned in accordance with the three fully illustrated legsv in Figurejl.

Projecting into the bosses 9V from the upper ends thereof are the Shanks-15 of the 80 perpendicularly extending air emitting tubes 16 which are suitably perforated as at v e 17. An annular flange 18 is formed at the Figure 6 is a detail view showing a modi-A juncture ,of the shank and-body portion of each tube. vThese tubes are shown closed at n their upper rounded ends but it is tobe under- Figure 7 is a horizontal sectional view of av furnace fire box showing the draft attach-f' stood that one or'rnore 'apertures may be formed thereinv if desired.

These tubes are to be formed from any desired material but it has been found that a 90 Vsquare base draft attachment rather than the annular base draft attachment shown in Figures 1, 2 and 7,.I This base, other than its 10o contour, is Substantially the same as the base i 7 above referred to and possesses the apertures 8, the hollow bosses 9V into Which are'.l

inserted the slianks of the air emitting tubes 16 in the manner shown best in Figure 2. rl`he legs 12 are adjustably connected to the base in the same manner as shoWn in Figure 2.

VI `ig-ure t shows a further 'moded form of auxiliary draft attachment Which is believed to beV especially suitable for the fire' boxes of commercial furnaces, thelatterbeing.y

generally of greater depth than Width. rEhe shape of the base 7b of this torn-ris the only difference between the same and the forms refer-red to above as this b'aSeisreCtangullarand vhas a transverse portion?. It is Ytobe un-v derstoodthat one or more of saidtransverse portions 7c may be provided 'in the formof attachment shown-1n Figure i and that one or more :tubes .16 may be mounted upon the` transverse portion. The remainder of the base 7b Vis provided with the suitably spaced tubes 1 6 and legs 12.

The connection between :the tube shanks 15 j and the bores of the bosses 9 maybe frictional only or a bayonet slot connectionlmayvbe .provided as illustrated at'19 in Figure 5. Either connection Willpermita tube-,tobe removed Y poker, or other suitable implement, may bey passed between theba-se and the grate .barsV `to vremoveashes from this space.'v It-Will be k tend so Athatr their gratebar engaging ends when desired-.but it is believed ,that the bayonet slot yconnection ywill insure the retention of the tube Where friction might fail.

Figure 6 shoivs in gsectiona'base TT which `formed With-a radially extending rib .10(1 which is intended .to ride in .the groovelldof 4 the leg112d. .It W-irll be seen that vthe rib 10d is inclined with respect tothe axis of the base ,7d -and that ythis inclination,willv permit the leg 12"`1 to be' adjusted yto vary the .Y distance,

between therplanes of. the .based andthesupportingface of the leg whereby -theelevation 'of the base :may be varied.v It will be Ynoted that the ladjustfment of the legs 12 abovereierredA to will notr elevation.

It is to be .understood 'that theseva-rious auxiliary draft attachments are to Abe remevably mounted in fire boxes and Will rest upon thegrat-e bars of the same, as shown in Fig. 7. The vlegshave been provided .for supf Vporting Vthe `base portionsin spaced relation to the top-facesoi`l the grate barsso that a noted, in .this connection. that the Ylegs extor-m a supporting arca or zone of'fgreater diameter or dimension than the diameter or' i dimensipn..of the base, Wherebywthe above Teferred to implementY maybe Vpegged` en :tirely vunderthe base. Y

lita/ill: be noted that in .each form Ythe base .'isot' skeletonor vrframe like 'formation and f Vthat it'will vform very little obstruction to .the

natural ,passage of' air through theburnng lingairinto a fuel bed, a horizontally extendlof the base.

produce this variation inV fuel. This frame like formation also will distribute the draft producing tubes or bars in such a manner that air Will be supplied to all portions of the fuel in the lire box.

Itis to be understood that the forms of this invention herewith shoWnand described are i tobetaken as preferred examples of the same, and? that'various changes in the shape, size,

and arrangement of parts may be resortedto Without departing from the spirit of the 1n- .vention or thev scopeofithesub-j oined claims.

Having thus described thejinvention, VI

in that means are provided for varying `the positionof the .ends ofthelegs in-tW-o difterent directions with respect to the ibase. Y 3. In a device for 'conducting and-discharg` ing base, a plurality of draft conducting .elef .ments carried by the base, and aplurality lof outwardly and downwardlyfextending legs arranged -so that their supported .ends Will form a zone rof greater diameter than that.

4. l[n a draft attachment of the type described, the combination 4With a 'tire box, :of

a Ari n,'g`f'like base of substantially thevsamee Y* 'j j general. contour as that lof athetirefbox .in which 1t is to lbe used, and :a .plurality of spaced .draftv conducting members carried n Y substantially .perpendicu-larly thereof.. In afdraft 'attachment'of the type v'descr1beda base, a plurality of drafticonductV` ing :members-'carried `by the base, `nfieans for supporting .the basein spaced relation with .respect to a supporting surface, and meansV for simultaneously adjusting `the last men 4.tioned means 'radially' and fperpendicularly Withrespectfto the base. :ti-.Ina draft attachmentfef-the typede-y scribed, a ring-like base, means forsupport-4 ity of perpendicularlyarranged draft conducting members carr-i'edlbyand opening through the-base. v

- 7.' ma device-,ef 'the type deserted, 'the ,2do

combination Witha tire box, and a grate struc- `ture thereinyofa attachment located vWithin the re 4box and''removably supported v on the grateV structure .for dis'trt'rtmtirngY throughout the fire .box .draft lwhichV passes upwardly through the grate structure, said V,attachment' including a centrallycutavvay .away base ,fa1 pluralitybf .hollowbosses formed Vonthe base with their boites .extending': through the bottom loftllie basenn@ a ving the .base` in an elevated .position With 4clearance' below all ofthe:same,v and a plural'- draft conducting member mounted on each boss.

8. In a device of the type described, the combination with a lire box, and a grate structure therein, of a draft attachment located Within the lire box and removably supported on the grate structure for distributing throughout the fire box draft which passes upwardly through the grate structure, said attachment including a base Vhaving a plurality of openings therethrough, a plurality of hollow perforated members carried by the base coaxially with said openings to receive draft passing upwardly therethrough, and legs for supporting the base in an elevated position with respect to the grate structure to permit the draft to enter the openings in the base.

9. In a device of the type described, the combination with a lire box, and a grate Y structure therein7 of a draft attachment located Within the lire lbox and supported on the grate structure for distributing throughout the re box `draft Which passesupwardly through the grate structure, saidattachment including a frame-like base, a plurality of draft conducting members arranged in spaced relation around the base to distribute the draft throughout the fire box, and means for supporting the base upon the grate structure at different elevations With respect to the latter. n

In testimony whereof, I affix my signature.

WILLIAM A. NOEL. 

